(19)
(11) EP 2 531 697 A2

(12)

(88) Date of publication A3:
12.04.2012

(43) Date of publication:
12.12.2012 Bulletin 2012/50

(21) Application number: 11707944.2

(22) Date of filing: 01.02.2011
(51) International Patent Classification (IPC): 
E21D 5/10(2006.01)
(86) International application number:
PCT/US2011/023290
(87) International publication number:
WO 2011/097201 (11.08.2011 Gazette 2011/32)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 02.08.2010 US 369856 P
20.10.2010 US 394800 P
04.02.2010 US 301316 P

(71) Applicant: Contech Engineered Solutions LLC
West Chester, OH 45069 (US)

(72) Inventor:
  • SANDERS, Darrell, J.
    Mason, OH 45040 (US)

(74) Representative: Bankes, Stephen Charles Digby et al
Baron Warren Redfern Cambridge House 100 Cambridge Grove Hammersmith
London W6 0LE
London W6 0LE (GB)

   


(54) MINE SHAFT LINER PLATE SYSTEM AND METHOD